java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:05:33,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:05:33,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:05:33,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:05:33,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:05:33,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:05:33,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:05:33,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:05:33,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:05:33,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:05:33,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:05:33,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:05:33,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:05:33,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:05:33,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:05:33,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:05:33,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:05:33,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:05:33,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:05:33,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:05:33,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:05:33,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:05:33,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:05:33,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:05:33,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:05:33,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:05:33,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:05:33,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:05:33,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:05:33,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:05:33,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:05:33,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:05:33,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:05:33,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:05:33,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:05:33,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:05:33,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:05:33,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:05:33,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:05:33,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:05:33,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:05:33,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:05:33,221 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:05:33,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:05:33,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:05:33,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:05:33,224 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:05:33,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:05:33,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:05:33,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:05:33,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:05:33,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:05:33,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:05:33,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:05:33,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:05:33,227 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:05:33,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:05:33,227 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:05:33,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:05:33,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:05:33,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:05:33,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:05:33,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:05:33,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:33,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:05:33,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:05:33,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:05:33,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:05:33,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:05:33,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:05:33,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:05:33,515 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:05:33,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:05:33,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:05:33,531 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:05:33,532 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:05:33,532 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2019-10-15 01:05:33,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa5f9026/bf7a03d5d1124a7ebf469e5ab1ccb10a/FLAG9b548ff55 [2019-10-15 01:05:34,004 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:05:34,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2019-10-15 01:05:34,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa5f9026/bf7a03d5d1124a7ebf469e5ab1ccb10a/FLAG9b548ff55 [2019-10-15 01:05:34,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa5f9026/bf7a03d5d1124a7ebf469e5ab1ccb10a [2019-10-15 01:05:34,443 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:05:34,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:05:34,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:34,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:05:34,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:05:34,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21eb6a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34, skipping insertion in model container [2019-10-15 01:05:34,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,461 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:05:34,482 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:05:34,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:34,704 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:05:34,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:34,738 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:05:34,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34 WrapperNode [2019-10-15 01:05:34,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:34,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:05:34,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:05:34,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:05:34,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... [2019-10-15 01:05:34,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:05:34,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:05:34,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:05:34,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:05:34,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:05:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:05:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:05:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:05:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:05:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:05:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:05:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:05:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:05:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:05:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:05:35,070 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:05:35,070 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:05:35,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:35 BoogieIcfgContainer [2019-10-15 01:05:35,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:05:35,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:05:35,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:05:35,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:05:35,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:05:34" (1/3) ... [2019-10-15 01:05:35,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577e4ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:35, skipping insertion in model container [2019-10-15 01:05:35,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:34" (2/3) ... [2019-10-15 01:05:35,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577e4ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:35, skipping insertion in model container [2019-10-15 01:05:35,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:35" (3/3) ... [2019-10-15 01:05:35,088 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2019-10-15 01:05:35,098 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:05:35,116 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:05:35,131 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:05:35,155 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:05:35,155 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:05:35,155 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:05:35,155 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:05:35,155 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:05:35,156 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:05:35,156 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:05:35,156 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:05:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:05:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:05:35,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:35,179 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:35,181 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:35,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1001202113, now seen corresponding path program 1 times [2019-10-15 01:05:35,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:35,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477688239] [2019-10-15 01:05:35,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:35,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477688239] [2019-10-15 01:05:35,280 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:35,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:05:35,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633922046] [2019-10-15 01:05:35,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:05:35,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:05:35,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:05:35,304 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-15 01:05:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:35,325 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-10-15 01:05:35,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:05:35,327 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 01:05:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:35,335 INFO L225 Difference]: With dead ends: 32 [2019-10-15 01:05:35,335 INFO L226 Difference]: Without dead ends: 13 [2019-10-15 01:05:35,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:05:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-15 01:05:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-15 01:05:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-15 01:05:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-15 01:05:35,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-15 01:05:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:35,374 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-15 01:05:35,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:05:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-15 01:05:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:05:35,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:35,375 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:35,376 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash 563077882, now seen corresponding path program 1 times [2019-10-15 01:05:35,376 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:35,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816002549] [2019-10-15 01:05:35,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:35,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816002549] [2019-10-15 01:05:35,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:35,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:05:35,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258778771] [2019-10-15 01:05:35,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:05:35,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:05:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:05:35,437 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-10-15 01:05:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:35,542 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-10-15 01:05:35,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:05:35,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-15 01:05:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:35,543 INFO L225 Difference]: With dead ends: 22 [2019-10-15 01:05:35,544 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:05:35,545 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:05:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:05:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:05:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:05:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:05:35,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:05:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:35,551 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:05:35,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:05:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:05:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:05:35,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:35,552 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:35,553 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash 620336184, now seen corresponding path program 1 times [2019-10-15 01:05:35,553 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:35,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620585943] [2019-10-15 01:05:35,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:35,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620585943] [2019-10-15 01:05:35,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:35,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:05:35,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214150359] [2019-10-15 01:05:35,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:05:35,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:05:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:05:35,587 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:05:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:35,606 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-10-15 01:05:35,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:05:35,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:05:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:35,608 INFO L225 Difference]: With dead ends: 32 [2019-10-15 01:05:35,608 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:05:35,609 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:05:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:05:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-15 01:05:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:05:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-15 01:05:35,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2019-10-15 01:05:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:35,616 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-15 01:05:35,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:05:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-15 01:05:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:05:35,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:35,617 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:35,618 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash -657196198, now seen corresponding path program 1 times [2019-10-15 01:05:35,618 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:35,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639944884] [2019-10-15 01:05:35,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:35,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:05:35,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639944884] [2019-10-15 01:05:35,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913188101] [2019-10-15 01:05:35,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:35,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:05:35,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:05:35,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:05:35,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [339173648] [2019-10-15 01:05:35,795 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 19 [2019-10-15 01:05:35,828 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:05:35,829 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:05:35,947 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:05:35,950 INFO L272 AbstractInterpreter]: Visited 14 different actions 73 times. Merged at 5 different actions 32 times. Widened at 1 different actions 5 times. Performed 197 root evaluator evaluations with a maximum evaluation depth of 4. Performed 197 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 10 fixpoints after 3 different actions. Largest state had 5 variables. [2019-10-15 01:05:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:35,955 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:05:35,955 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:35,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2019-10-15 01:05:35,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572490975] [2019-10-15 01:05:35,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:05:35,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:05:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:05:35,957 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-10-15 01:05:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:36,004 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-10-15 01:05:36,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:05:36,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:05:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:36,006 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:05:36,006 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:05:36,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:05:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:05:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:05:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:05:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-15 01:05:36,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2019-10-15 01:05:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:36,014 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-15 01:05:36,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:05:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-15 01:05:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:05:36,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:36,015 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:36,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:36,219 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash -755753187, now seen corresponding path program 2 times [2019-10-15 01:05:36,220 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:36,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405417741] [2019-10-15 01:05:36,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:36,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:36,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 01:05:36,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405417741] [2019-10-15 01:05:36,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537929169] [2019-10-15 01:05:36,323 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:36,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-15 01:05:36,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:05:36,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:05:36,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:05:36,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:05:36,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1397155097] [2019-10-15 01:05:36,480 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:36,480 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:36,480 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:36,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2019-10-15 01:05:36,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88408401] [2019-10-15 01:05:36,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:05:36,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:05:36,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:05:36,497 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-10-15 01:05:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:36,655 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-10-15 01:05:36,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:05:36,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-15 01:05:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:36,659 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:05:36,659 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:05:36,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:05:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:05:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2019-10-15 01:05:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:05:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-15 01:05:36,668 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 27 [2019-10-15 01:05:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:36,669 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-15 01:05:36,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:05:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-15 01:05:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 01:05:36,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:36,670 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:36,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:36,875 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2049938595, now seen corresponding path program 3 times [2019-10-15 01:05:36,876 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:36,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795248407] [2019-10-15 01:05:36,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:36,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:36,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:37,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795248407] [2019-10-15 01:05:37,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120049108] [2019-10-15 01:05:37,084 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:37,131 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:05:37,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:05:37,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:05:37,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 74 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:05:37,238 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 74 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:05:37,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [858244139] [2019-10-15 01:05:37,364 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:37,364 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:37,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:37,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2019-10-15 01:05:37,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546794107] [2019-10-15 01:05:37,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:05:37,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:05:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:05:37,367 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 26 states. [2019-10-15 01:05:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:37,568 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2019-10-15 01:05:37,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:05:37,569 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2019-10-15 01:05:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:37,570 INFO L225 Difference]: With dead ends: 85 [2019-10-15 01:05:37,570 INFO L226 Difference]: Without dead ends: 61 [2019-10-15 01:05:37,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:05:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-15 01:05:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-10-15 01:05:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-15 01:05:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-10-15 01:05:37,583 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 39 [2019-10-15 01:05:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:37,583 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-10-15 01:05:37,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:05:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-10-15 01:05:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:05:37,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:37,588 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:37,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:37,789 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:37,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash 585284605, now seen corresponding path program 4 times [2019-10-15 01:05:37,790 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:37,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545478170] [2019-10-15 01:05:37,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:37,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:37,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-15 01:05:37,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545478170] [2019-10-15 01:05:37,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108947290] [2019-10-15 01:05:37,976 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:38,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:05:38,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 170 proven. 155 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:05:38,200 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 170 proven. 155 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:05:38,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1293883459] [2019-10-15 01:05:38,444 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:38,444 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:38,445 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:38,445 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2019-10-15 01:05:38,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870344513] [2019-10-15 01:05:38,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:05:38,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:05:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:05:38,447 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 32 states. [2019-10-15 01:05:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:39,568 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2019-10-15 01:05:39,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-15 01:05:39,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 57 [2019-10-15 01:05:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:39,570 INFO L225 Difference]: With dead ends: 178 [2019-10-15 01:05:39,570 INFO L226 Difference]: Without dead ends: 154 [2019-10-15 01:05:39,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1759, Invalid=5047, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:05:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-10-15 01:05:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2019-10-15 01:05:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-15 01:05:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2019-10-15 01:05:39,587 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 57 [2019-10-15 01:05:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:39,588 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2019-10-15 01:05:39,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:05:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2019-10-15 01:05:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:05:39,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:39,591 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 22, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:39,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:39,794 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:39,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:39,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1756195272, now seen corresponding path program 5 times [2019-10-15 01:05:39,796 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:39,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325281350] [2019-10-15 01:05:39,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:39,797 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:39,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-15 01:05:40,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325281350] [2019-10-15 01:05:40,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600811143] [2019-10-15 01:05:40,016 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:40,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-10-15 01:05:40,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:05:40,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 01:05:40,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 764 proven. 121 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-10-15 01:05:40,181 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 764 proven. 121 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-10-15 01:05:40,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [39026801] [2019-10-15 01:05:40,367 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:40,367 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:40,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:40,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2019-10-15 01:05:40,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104602252] [2019-10-15 01:05:40,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:05:40,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:05:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:05:40,370 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 19 states. [2019-10-15 01:05:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:40,765 INFO L93 Difference]: Finished difference Result 236 states and 295 transitions. [2019-10-15 01:05:40,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:05:40,768 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-10-15 01:05:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:40,771 INFO L225 Difference]: With dead ends: 236 [2019-10-15 01:05:40,772 INFO L226 Difference]: Without dead ends: 231 [2019-10-15 01:05:40,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 214 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=851, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:05:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-10-15 01:05:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 124. [2019-10-15 01:05:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-15 01:05:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2019-10-15 01:05:40,801 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 96 [2019-10-15 01:05:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:40,802 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2019-10-15 01:05:40,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:05:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2019-10-15 01:05:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:05:40,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:40,804 INFO L380 BasicCegarLoop]: trace histogram [38, 37, 22, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:41,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:41,013 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1838430173, now seen corresponding path program 6 times [2019-10-15 01:05:41,014 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:41,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868470234] [2019-10-15 01:05:41,014 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:41,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:41,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 1372 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-15 01:05:41,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868470234] [2019-10-15 01:05:41,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391334304] [2019-10-15 01:05:41,295 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:41,361 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:05:41,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:05:41,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:05:41,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 1042 proven. 737 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:05:41,842 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 1042 proven. 737 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:05:42,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [113893330] [2019-10-15 01:05:42,836 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:42,836 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:42,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:42,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 25] total 66 [2019-10-15 01:05:42,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171368898] [2019-10-15 01:05:42,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-10-15 01:05:42,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:42,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-10-15 01:05:42,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1285, Invalid=3005, Unknown=0, NotChecked=0, Total=4290 [2019-10-15 01:05:42,842 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand 66 states. [2019-10-15 01:05:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:46,416 INFO L93 Difference]: Finished difference Result 575 states and 721 transitions. [2019-10-15 01:05:46,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2019-10-15 01:05:46,417 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 123 [2019-10-15 01:05:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:46,420 INFO L225 Difference]: With dead ends: 575 [2019-10-15 01:05:46,420 INFO L226 Difference]: Without dead ends: 521 [2019-10-15 01:05:46,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8457 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7266, Invalid=23184, Unknown=0, NotChecked=0, Total=30450 [2019-10-15 01:05:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2019-10-15 01:05:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 223. [2019-10-15 01:05:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-10-15 01:05:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 248 transitions. [2019-10-15 01:05:46,451 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 248 transitions. Word has length 123 [2019-10-15 01:05:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:46,452 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 248 transitions. [2019-10-15 01:05:46,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-10-15 01:05:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 248 transitions. [2019-10-15 01:05:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-15 01:05:46,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:46,455 INFO L380 BasicCegarLoop]: trace histogram [63, 62, 46, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:46,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:46,660 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1470505704, now seen corresponding path program 7 times [2019-10-15 01:05:46,662 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:46,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030864379] [2019-10-15 01:05:46,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:46,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:46,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 0 proven. 2662 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2019-10-15 01:05:47,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030864379] [2019-10-15 01:05:47,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520514709] [2019-10-15 01:05:47,111 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:47,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 01:05:47,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2286 proven. 3197 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-15 01:05:48,454 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2286 proven. 3197 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-15 01:05:49,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [713390801] [2019-10-15 01:05:49,814 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:49,814 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:49,815 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:49,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 49, 49] total 71 [2019-10-15 01:05:49,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829381906] [2019-10-15 01:05:49,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-10-15 01:05:49,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-10-15 01:05:49,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1501, Invalid=3469, Unknown=0, NotChecked=0, Total=4970 [2019-10-15 01:05:49,821 INFO L87 Difference]: Start difference. First operand 223 states and 248 transitions. Second operand 71 states. [2019-10-15 01:05:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:54,099 INFO L93 Difference]: Finished difference Result 680 states and 833 transitions. [2019-10-15 01:05:54,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2019-10-15 01:05:54,099 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 198 [2019-10-15 01:05:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:54,104 INFO L225 Difference]: With dead ends: 680 [2019-10-15 01:05:54,104 INFO L226 Difference]: Without dead ends: 599 [2019-10-15 01:05:54,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 394 SyntacticMatches, 44 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10803 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8510, Invalid=27022, Unknown=0, NotChecked=0, Total=35532 [2019-10-15 01:05:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-10-15 01:05:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 238. [2019-10-15 01:05:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-15 01:05:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2019-10-15 01:05:54,150 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 198 [2019-10-15 01:05:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:54,150 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2019-10-15 01:05:54,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-10-15 01:05:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2019-10-15 01:05:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-15 01:05:54,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:54,156 INFO L380 BasicCegarLoop]: trace histogram [68, 67, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:54,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:54,364 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1155791421, now seen corresponding path program 8 times [2019-10-15 01:05:54,365 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:54,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578722069] [2019-10-15 01:05:54,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:54,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:54,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 5880 proven. 902 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-15 01:05:55,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578722069] [2019-10-15 01:05:55,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271254096] [2019-10-15 01:05:55,477 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:55,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-10-15 01:05:55,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:05:55,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-15 01:05:55,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 4393 proven. 902 refuted. 0 times theorem prover too weak. 1539 trivial. 0 not checked. [2019-10-15 01:05:55,653 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 4393 proven. 902 refuted. 0 times theorem prover too weak. 1539 trivial. 0 not checked. [2019-10-15 01:05:55,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2089908782] [2019-10-15 01:05:55,981 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:55,982 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:55,982 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:55,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 21, 21] total 53 [2019-10-15 01:05:55,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992217927] [2019-10-15 01:05:55,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-15 01:05:55,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-15 01:05:55,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:05:55,984 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 53 states. [2019-10-15 01:05:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:56,427 INFO L93 Difference]: Finished difference Result 1318 states and 1730 transitions. [2019-10-15 01:05:56,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 01:05:56,428 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 213 [2019-10-15 01:05:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:56,435 INFO L225 Difference]: With dead ends: 1318 [2019-10-15 01:05:56,435 INFO L226 Difference]: Without dead ends: 1313 [2019-10-15 01:05:56,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 409 SyntacticMatches, 36 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:05:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2019-10-15 01:05:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 313. [2019-10-15 01:05:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-10-15 01:05:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 364 transitions. [2019-10-15 01:05:56,463 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 364 transitions. Word has length 213 [2019-10-15 01:05:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:56,464 INFO L462 AbstractCegarLoop]: Abstraction has 313 states and 364 transitions. [2019-10-15 01:05:56,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-15 01:05:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 364 transitions. [2019-10-15 01:05:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-10-15 01:05:56,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:56,469 INFO L380 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:56,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:56,680 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash -644776136, now seen corresponding path program 9 times [2019-10-15 01:05:56,681 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:56,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911361327] [2019-10-15 01:05:56,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:56,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:56,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:00,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911361327] [2019-10-15 01:06:00,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745549757] [2019-10-15 01:06:00,582 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:00,718 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:06:00,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:06:00,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 208 conjunts are in the unsatisfiable core [2019-10-15 01:06:00,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:03,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:04,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:06,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1387557882] [2019-10-15 01:06:06,121 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:06:06,121 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:06:06,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:06:06,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 158 [2019-10-15 01:06:06,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643597518] [2019-10-15 01:06:06,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 158 states [2019-10-15 01:06:06,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2019-10-15 01:06:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2916, Invalid=21890, Unknown=0, NotChecked=0, Total=24806 [2019-10-15 01:06:06,125 INFO L87 Difference]: Start difference. First operand 313 states and 364 transitions. Second operand 158 states.